Install Window Trim Over Siding

If the trim is being applied over the hardi panels.

Install window trim over siding. If we installed the trim after the siding we would have had to caulk a ton to fill in for the different levels the layered siding creates. Before you replace the siding cut and install new j channels to prevent water from leaking into your home. Make sure that a drip cap is installed first over the window before going for the hardie siding. In order to get the most accurate cut line we decided to place our new window in the opening to trace it.

The wrb is lapped over the head flashing or the flashing is taped. Cut the horizontal piece to size and snap it in place over the vertical moldings. Touch up the divided hardie trim boards before trimming them to your window. The rain screen battens are run down to the top of the window flange.

The cement board panels are fastened to the battens. The head flashing is installed in a bed of caulking onto the top of the window frame. Building paper is an important part of the wall s waterproofing. Here is one great way to trim out a window or door opening with aluminum coil when using progressive foam insulation for plank style sidings such as fiber ce.

Level and tack the new window in place then cut a piece of aluminum flashing to width so it extends from the new window to overlap the nailing hem of the siding below. You will see the trims lay nice and flat. This meant our new windows would have trim that was much wider than our old windows making it necessary to cut away a bit of our siding to sit flush with the edge of that new trim.